Home / 7,139.68-10,708.48-2,212.64

Finding the Fourth Proportional to 7,139.68, 10,708.48 and 2,212.64

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Solution

The fourth proportional to 7,139.68, 10,708.48 and 2,212.64 is: 3,318.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.68 : 10,708.48 = 2,212.64 : x
  2. Step 2: Convert to fraction form
    7,139.68/10,708.48 = 2,212.64/x
  3. Step 3: Cross multiply
    7,139.68x = 10,708.48 × 2,212.64
  4. Step 4: Simplify right side
    7,139.68x = 23,694,011.19
  5. Step 5: Solve for x
    x = 23,694,011.19/7,139.68
  6. Step 6: Final answer
    x = 3,318.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.